231192 ⎘
Details of selecting apparatus or arrangements; Electrical details; Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
Method and apparatus for transmitting PLCP frame in wireless local area network system
#2Method and apparatus for transmitting PLCP frame in wireless local area network system
#3Method and apparatus for transmitting PLCP frame in wireless local area network system
#4Method and apparatus for transmitting PLCP frame in wireless local area network system
#5Method and apparatus for transmitting PLCP frame in wireless local area network system
#6Telephone Call Processing
#7Method and apparatus for transmitting PLCP frame in wireless local area network system
#8Low complexity tone/voice discrimination method using a rising edge of a frequency power envelope
#9TONE DETERMINATION DEVICE AND TONE DETERMINATION METHOD
#10Method and apparatus for transmitting PLCP frame in wireless local area network system
#11Method and apparatus for transmitting signaling tones over a packet switched network
#12Tone detection for signals sent through a vocoder
#13Tunable filter for tone detection
#14Method and apparatus for DTMF detection and voice mixing in the CELP parameter domain
#15Multi-frequency tone detector
#16Tone detector judging a detection of a predetermined tone signal by comparing a characteristic quantity of the tone signal with characteristic quantities of other signals
#17Method and system for tone detection
#18Detection of both voice and tones using Goertzel filters
#19Methods and apparatus for detecting signaling tones in telephony data signal
#20Method and apparatus for intelligent dual-tone multi-frequency (DTMF) decoding and identification
#21Detection and identification of synchronizing signals embedded in voice or data